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ceedubs/unison-nix-snake

Example of building a Unison program via Nix
Source code at GitHub null
ceedubs/unison-nix-snake.json
{
  "createdAt": "2024-01-18T04:12:02Z",
  "defaultBranch": "main",
  "description": "Example of building a Unison program via Nix",
  "fullName": "ceedubs/unison-nix-snake",
  "homepage": null,
  "language": "Nix",
  "name": "unison-nix-snake",
  "pushedAt": "2025-05-21T00:46:40Z",
  "stargazersCount": 11,
  "topics": [],
  "updatedAt": "2025-07-25T14:33:13Z",
  "url": "https://github.com/ceedubs/unison-nix-snake"
}

Unison Nix Snake

Section titled “Unison Nix Snake”

This repository demonstrates using unison-nix to easily package an app written in Unison.

asciicast

Running the app

Section titled “Running the app”
Terminal window
nix run github:ceedubs/unison-nix-snake

If you are on an ARM-based Mac (M1, etc) you may need to run the following (since Unison doesn’t yet release ARM builds):

Terminal window
nix run --system x86_64-darwin github:ceedubs/unison-nix-snake

The first time that you run this, it will take a while to pull the project from Share. But Nix will cache the result and subsequent runs should be nearly instantaneous.

Packaging your own Unison app with Nix

Section titled “Packaging your own Unison app with Nix”

Copy [flake.nix]!(flake.nix) and change the fields passed to buildUnisonShareProject as needed.

To start, set compiledHash = pkgs.lib.fakeHash. When you do a nix run, Nix will complain about the compiled hash not matching and will tell you the actual hash that you should use instead.